<!DOCTYPE html>
<html>
  <head>
      <meta charset="UTF-8">
      <title>窗口之间的交互</title>
      <script src="event.js"></script>
  </head>
  <body>
  <button onclick="onClick_SendData()">向新窗口传递数据</button>
  <p/>
  <label id="label_return"></label>
  </body>
</html>
